CN209605716U - Segment offset measuring device - Google Patents

Abstract

The utility model discloses a device for measuring segment staggered platforms. The device comprises a first measuring ruler (1) and a second measuring ruler (2). Both the first measuring ruler and the second measuring ruler are equipped with A ruler with a scale; the 0 scale line end of the first measuring ruler is connected to the 0 scale line end of the second measuring ruler, and the angle between the first measuring ruler and the second measuring ruler is 180°‑θ , The amount of error a=scale reading L*sin(180°‑θ). The measurement method includes step 1: attaching the scale line side of the first measuring ruler to the first segment (3); step 2: sliding the first measuring ruler along the direction of the first segment to the second segment, Make the scale line side of the second measuring ruler contact the upper edge of the second segment; Step 3: Calculate the amount of misalignment a through the scale reading L. The utility model reduces the measurement error and measurement work intensity, provides accurate and timely data on the wrong platform for the shield formed tunnel, assists in analyzing the cause of the wrong platform and adjusts the construction parameters, and provides a preliminary basis for the high-quality formed tunnel.

Description

Segment offset measuring device

technical field

The utility model relates to a measuring tool in shield tunneling construction, in particular to a segment offset measuring device.

Background technique

In shield construction technology, the quality of the formed tunnel is an important basis for measuring the quality of the main project. The quality parameters of the formed tunnel include water seepage, damage, misalignment, ellipticity, elevation, horizontal position, etc. The important acceptance items of the tunnel acceptance must meet the 100% pass rate required by the design and specification in order to pass the project acceptance. Segment misalignment is the dimensional deviation formed between adjacent segments of the same ring or adjacent ring segments after the assembly is completed. There are many factors that affect the size of the misalignment, such as: shield posture, segment bolt tightening, synchronization Timely and accurate mastering of segment mislocation data is an important basis for analyzing the parameters of shield tunneling construction and whether the concealed project is qualified.

In the prior art, the measurement method of shield segment displacement usually uses a steel ruler to assist the feeler gauge for measurement. The principle is to use the steel ruler to convert the displacement value into a gap value, and then use the feeler gauge to measure the gap value, that is is the segment misalignment value. If the arc surface of the adjacent segment is uneven, first put the steel ruler close to the raised arc surface of the segment along the direction perpendicular to the annular seam or the longitudinal seam, and then insert the feeler gauge into the steel ruler and the other pipe. In the gap of the arc surface, the last value read on the feeler gauge is the value of segment misalignment. The measurement tools and methods of the prior art have the following disadvantages:

1. When measuring the segment misalignment, due to the measuring principle of the feeler gauge, the feeler gauge needs to be attached to the lower arc surface of the segment, and the steel ruler is close to the raised segment, but the segment is an arc The surface of the feeler gauge is linear, so that the arc surface of the tube and the feeler gauge cannot be closely fitted, resulting in measurement errors; and the longer the feeler gauge length, the less tightly the fit and the greater the error , resulting in errors in the measured data, the measurement is inconvenient and requires both hands to complete the operation.

2. During the measurement process, it is necessary to hold the steel ruler in one hand and the feeler gauge in the other hand, which is inconvenient to operate, and it requires the cooperation of a second person to save the image data, which consumes manpower.

Utility model content

The purpose of this utility model is to provide a device and method for measuring segment displacement, which makes the measurement work convenient, fast and simple, reduces the measurement error and measurement work intensity, and provides accurate and timely measurement for shield tunnels. The wrong platform data can be used to assist in the analysis of the cause of the wrong platform in a targeted manner, which is convenient for timely adjustment of construction parameters and determination of remedial measures for the wrong platform, providing a preliminary basis for high-quality formed tunnels.

The utility model is achieved in that:

A segment staggered measuring device, comprising a first measuring ruler and a second measuring ruler, both of which are straightedges with scales; the 0 of the first measuring ruler The end of the scale line is connected to the end of the 0 scale line of the second measuring ruler, the angle between the first measuring ruler and the second measuring ruler is 180°-θ, and the amount of misalignment a=scale reading L*sin(180 °-θ).

The first measuring ruler and the second measuring ruler are symmetrical about their connecting ends.

The θ is set at 5.74°, so that the amount of misalignment a=scale reading L*sin5.74°=0.1L.

The scale accuracy of the first measuring ruler and the second measuring ruler is 1 mm, and the measurement accuracy of the offset amount a is 0.1 mm.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model reflects the value of the misalignment through the ratio of the short side and the long side or the hypotenuse of a right triangle, which greatly simplifies the measurement process and improves the efficiency and accuracy of the measurement work.

2. The utility model can adjust the measurement accuracy by changing the angle between the two measuring rulers, and has a wide range of applications. The θ angle of the two measuring rulers is preferably 5.74°, which can increase the measurement accuracy to 0.1mm. It provides an accurate reference basis for the formation of shield tunnels.

3. The utility model adopts two measuring rulers with scales, which can realize two-way measurement, and can also be used as an ordinary measuring ruler at the same time. One ruler is multi-purpose, and the modified vernier caliper can also be used as the measuring ruler of the utility model It is easy to use and obtain materials, and the cost is low.

The utility model utilizes the trigonometric function principle to directly convert the misalignment value to the right-angled side or the hypotenuse of the triangle by using the mathematical relationship, which can facilitate direct reading and solve the problem caused by the loose fit in the existing segment misalignment measurement technology. Large error, low precision, inconvenient operation, complex tool structure and other shortcomings, it is not necessary to convert the staggered value into the gap value measurement, which reduces the data error caused by the physical conversion of multiple tools, and eliminates the difference between the feeler gauge and the gap value during measurement. The error caused by the lax fit between the arc surfaces of the segments simplifies the operation process of the existing measurement method, making the measurement of the shield segment wrong platform convenient and fast, and can also be carried out according to different measurement accuracy requirements. Adjustment.

Description of drawings

Fig. 1 is the front view of the utility model segment displacement measuring device;

Fig. 2 is a schematic diagram of the utility model segment displacement measuring device;

Fig. 3 is a schematic diagram of the operation of the method for measuring segment displacement of the utility model.

Among the figure, 1 is the first measuring ruler, 2 is the second measuring ruler, 3 is the first segment, and 4 is the second segment.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Please refer to accompanying drawing 1, a device for measuring segment displacement, including a first measuring ruler 1 and a second measuring ruler 2, the first measuring ruler 1 and the second measuring ruler 2 are scaled Straightedge; the 0 scale line end of the first measuring ruler 1 is symmetrically connected with the 0 scale line end of the second measuring ruler 2, and the angle between the first measuring ruler 1 and the second measuring ruler 2 is 180° -θ, the amount of misalignment a=scale reading L*sin(180°-θ).

The first measuring ruler 1 and the second measuring ruler 2 are symmetrical with respect to their connecting ends, so as to adapt to the measurement of different azimuths.

Please refer to accompanying drawing 2, the principle of the present utility model is: in right triangle ABC, the length of right angle side BC is set as a, the angle of ∠CAB is θ, can know AC by the trigonometric function relation of right angle side BC and hypotenuse AC The length is a/sinθ, that is, BC: AC=a:a/sinθ=1:1/sinθ, that is, when 0°<θ<90°, the length of AC side is a/sinθ, then the point C goes to the side AB The length of the vertical line is a. Conversely, when the length of BC is a and the angle of ∠CAB is θ (0°<θ<90°), the length of AC is a/sinθ. At this time, mark the scale on the side of AC, that is, AC The reading is L. In actual operation, the extension line of side AB is the measuring ruler that fits the lower step segment of the staggered platform, and the side length of AC is the measuring ruler that contacts the raised segment of the staggered platform. The value of the side length of AC can be obtained by The scale marks are read directly.

When a is constant, the function image of L=a/sinθ (0°<θ<90°) is a monotonically decreasing function, and the function value decreases as θ increases, and the minimum value is 1 when θ=90° .

Preferably, the θ is set at 5.74°, so that the misalignment a=scale reading L*sin5.74°=0.1L, that is, when the AC side length reading is 10mm, the misalignment a is 1mm, which can be conveniently Obtain the value of the amount of error by reading. The scale accuracy of the first measuring ruler 1 and the second measuring ruler 2 is 1 mm, and the measurement accuracy of the offset amount a is 0.1 mm.

Please refer to accompanying drawing 3, a kind of segment displacement measurement method, comprises the following steps:

Step 1: Attach the scale line side of the first measuring ruler 1 to the first segment 3 (that is, the step segment under the staggered stage).

Step 2: Slide the first measuring ruler 1 along the direction of the first segment 3 to the second segment 4 (that is, the staggered convex segment), so that the scale line side of the second measuring ruler 2 is aligned with the second segment Step 3: Read the scale reading L through the scale line, and calculate the misalignment a according to the formula misalignment a=scale reading L*sin(180°-θ). The unit of the scale reading L is cm, and the unit of the misalignment a is mm. When θ is set to 5.74°, the value of the misalignment a can be read directly through the scale value only by converting the unit.

Example:

Take two rulers with a scale range of 0-15cm, an accuracy of 1mm, and a width of 35mm as the first measuring ruler 1 and the second measuring ruler 2, and connect them symmetrically at the 0 scale line to form an integrated structure, and the first The included angle between the measuring ruler 1 and the second measuring ruler 2 is 174.26°, that is, θ=5.74°, the misalignment a=L*sinθ=0.1L, and the measurement accuracy of the misalignment a is 0.1mm. Put the side with the scale line of the first measuring ruler 1 on the first segment 3, that is, the lower step segment of the staggered stage, and move along the direction of the first segment 3 to the second segment 4, that is, the raised segment of the staggered stage Move until the side with the scale line of the second measuring ruler 2 is just in contact with the second tube piece 4, and read the scale at the point of contact with the second tube piece 4 on the second measuring ruler 2 to be 9.1 cm, then The amount of misalignment a is 9.1mm. When the raised segment of the staggered platform is located on the other side of the segment of the lower step of the staggered platform, due to the symmetry of the utility model, the reverse operation process remains unchanged, and the second measuring ruler 2 is pasted on the first segment 3 , and make the first measuring ruler 1 contact with the second segment 4.

The above are only preferred embodiments of the utility model, and are not used to limit the scope of protection of the utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall include Within the protection scope of the present utility model.

Claims (4)

1. A segment measuring device for segment dislocation, characterized in that it comprises a first measuring ruler (1) and a second measuring ruler (2), the first measuring ruler (1) and the second measuring ruler ( 2) are rulers with scales; the 0 scale line end of the first measuring ruler (1) is connected with the 0 scale line end of the second measuring ruler (2), and the first measuring ruler (1) is connected with the second measuring ruler (1). The included angle between the two measuring rulers (2) is 180°-θ, and the amount of misalignment a=scale reading L*sin(180°-θ). 2. The segment displacement measuring device according to claim 1, characterized in that: the first measuring ruler (1) and the second measuring ruler (2) are symmetrical about their connecting ends. 3. The segment displacement measuring device according to claim 1, characterized in that: said θ is set at 5.74°, so that the displacement a=scale reading L*sin5.74°=0.1L. 4. The device for measuring segment displacement according to claim 3, characterized in that: the scale accuracy of the first measuring ruler (1) and the second measuring ruler (2) is 1 mm, and the displacement amount a The measurement accuracy is 0.1mm.